<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>404 - 页面不见了</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        *{margin:0;padding:0;box-sizing:border-box;}
        body{
            height:100vh;
            display:flex;
            align-items:center;
            justify-content:center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #fff;
        }
        .box{
            text-align:center;
            padding:2rem;
        }
        .box h1{
            font-size:6rem;
            margin-bottom:1rem;
        }
        .box p{
            font-size:1.25rem;
            margin-bottom:2rem;
        }
        .box a{
            display:inline-block;
            padding:.75rem 1.5rem;
            background:#fff;
            color:#667eea;
            border-radius:4px;
            text-decoration:none;
            font-weight:500;
            transition: background .3s, color .3s;
        }
        .box a:hover{
            background:#f0f0f0;
            color:#764ba2;
        }
    </style>
</head>
<body>
    <div class="box">
        <h1>404</h1>
        <p>抱歉，你访问的页面不见了~</p>
        <a href="/index.html">返回首页</a>
    </div>
</body>
</html>